OHV COMMERCIAL ENGINE - The durable Honda GX series commercial grade engine is easy starting and provides ample power for the toughest conditions. ISOLATION MOUNTED ENGINE AND PUMP - High performance mounts minimize vibration, keeping the pump from 4 VANE HIGH EFFICIENCY IMPELLER - The WB20's exclusive, Honda-designed 4 vane impeller offers improved performance and high efficiency. DURABLE - The WB20 features abrasion-resistant silicone-carbide seals for extended wear. CAST IRON VOLUTE - The rigid-mount cast iron volute reduces case wear, increasing the life of the pump. PUMP 2"